Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-18-07, 09:30 PM   #1
80vette
Gear Head
Thread Starter
 
80vette's Avatar
 
Join Date: Dec 2004
Location: Tampa, Fl., Dallas, Tx.
Bikes: 07' Colnago CLX, 04' Allez,03' KHS, 79' super leTour304
Posts: 943
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ultegra 9 speed triple to double FD issue

I just converted my Utlegra triple to a compact double.
I change the FD to a double .

When I installed the cable I on the FD I went to the full slack position then installed.

Now what was my trim position is there when I shift to the big ring.

Let me say it another way.

Starting in the small ring.. when I shift to the large ring I have to trim the FD to stop the rub.

How do I adjust this out.
Do I start with the shifter in a different position then cable up the FD?

Other thoughts?
80vette is offline   Reply With Quote
Old 01-18-07, 09:36 PM   #2
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Did you replace the bottom bracket to the double version (shorter spindle)?
If you have then I would start by checking the high side limit screw, actually both limit screws.
Then check the cable tension.
You started in the correct position, cable all the way out. Most Shimano shifters are double/triple compatible. You can expect to have more positions than you need.

Al
Al1943 is offline   Reply With Quote
Old 01-18-07, 10:03 PM   #3
80vette
Gear Head
Thread Starter
 
80vette's Avatar
 
Join Date: Dec 2004
Location: Tampa, Fl., Dallas, Tx.
Bikes: 07' Colnago CLX, 04' Allez,03' KHS, 79' super leTour304
Posts: 943
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes forgot to mention that I did replace the bottom bracket.
Yes I have adjusted the limit screws ... no problem with the chain going to far either way.

I just have the "trim" issue.
80vette is offline   Reply With Quote
Old 01-18-07, 10:14 PM   #4
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by 80vette
Yes forgot to mention that I did replace the bottom bracket.
Yes I have adjusted the limit screws ... no problem with the chain going to far either way.

I just have the "trim" issue.
Are we talking about the chain rubbing against the front derailleur when on the big ring?
if so which cog(s) is the chain on when this happens?
Sometimes a re-alignment of the derailleur can fix this.
I'm thinking you really shouldn't have chainrub on the derailleur when on the big ring unless you are cross-chained to the biggest cassette cog.

Compact doubles often have chainrub on the side of the big ring with the chain running on the inner chainirng and smaller cogs, especially if the inner ring is a 34. This can be partially corrected with a bottom bracket spacer.
Al1943 is offline   Reply With Quote
Old 01-19-07, 05:18 AM   #5
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,744
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 144 Post(s)
It sounds to me like you have a cable tension adjustment issue. When you get your front derailleur dialed in, you should have a trim position for each front chainring. It might take a couple of tries to get it perfect.
Retro Grouch is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:33 AM.